@c1:#333333;
@c2:#666666;
@c3:#999999;
@c4:#cccccc;
@c5:#f6d9b6;

@g1:#ffffff;
@g2:#f5f5f5;
@g3:#d9d9d9;
@g4:#8c8c8c;
@g5:#000000;

@f1:#ff4d4f;
@f2:#f5222d;

@r1: rgba(255, 255, 255, .4);
@r2: rgba(255, 255, 255, .8);

@b1:#69b1ff;
@b2:#4096ff;
@b3:#1677ff;
@b4:#0958d9;

/** 
* copy字体大小
*/ 
@fs:18px;

/** 定义一个相对定位方法 */
.rel(@hei: 100%; @dis: block;) {
    display: @dis;
    position: relative;
    height: @hei;
    overflow-x: hidden;
}